Hydraulic pipeline

Abstract

The utility model provides a hydraulic pipeline, which relates to the field of hydraulic system pipeline connection, and comprises a pipeline main body, the end part of the pipeline main body is provided with a screwed joint with a first butt joint surface, the inner wall of the screwed joint is provided with a limiting ring, and the inner wall of the limiting ring forms a positioning groove; a threaded joint with a second butt joint surface is arranged at the end part of the hydraulic joint, and a positioning boss is arranged on the inner wall of the threaded joint; a connecting nut; the sealing ring is arranged between the first butt joint surface and the second butt joint surface; and the positioning boss is matched with the positioning groove in shape. According to the invention, the positioning boss is matched with the positioning groove in the limiting ring in an inserting manner, so that the two butt joint surfaces are accurately guided and restrained to be aligned in parallel, the coaxiality is ensured, and the problem of poor precision of manual alignment is solved. And meanwhile, the assembly efficiency is improved, stress concentration is avoided, the nut breakage risk is reduced, double sealing of the sealing ring and the sealing convex piece is combined, hydraulic medium leakage is effectively prevented, and stable and reliable operation of a system is guaranteed.

Description

A hydraulic pipeline Technical Field

[0001] This utility model relates to the field of hydraulic system pipeline connection, and in particular to a hydraulic pipeline. Background Technology

[0002] Hydraulic pipelines, as a crucial component of hydraulic systems, play a vital role in transmitting hydraulic media. Through reliable connections with hydraulic couplings, they efficiently transmit the pressure energy output from the hydraulic pump to the actuators, thereby enabling precise motion control and power output of the equipment. In the operation of hydraulic systems in industrial production, construction machinery, and other fields, the quality of this connection directly affects the stability, reliability, and efficiency of the entire system.

[0003] Currently, the assembly of hydraulic joints and hydraulic pipe joints is generally done manually. Due to the lack of precise positioning devices, operators rely solely on experience, making it difficult to guarantee the parallelism and coaxiality of the two mating surfaces. This traditional assembly method not only consumes a significant amount of time, resulting in low assembly efficiency, but also, when tightening the connecting nut, the localized stress concentration caused by the misalignment of the mating surfaces can cause the nut to bear loads exceeding its design range, greatly increasing the risk of nut breakage. Once the nut breaks, the hydraulic medium will leak, resulting in resource waste and potentially causing serious consequences such as equipment downtime and safety accidents. Therefore, a new hydraulic pipe assembly method is proposed. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by precisely guiding and constraining the parallel alignment of two mating surfaces through the interlocking of the positioning boss and the positioning groove in the limiting ring, ensuring coaxiality and solving the problem of poor accuracy in manual alignment. It also improves assembly efficiency, avoids stress concentration, reduces the risk of nut breakage, and, combined with the double sealing of the sealing ring and sealing protrusion, effectively prevents hydraulic medium leakage, ensuring stable and reliable system operation.

[0005] To solve the above-mentioned technical problems, this utility model solves the problem that it is difficult to guarantee the parallelism and coaxiality of the two mating surfaces during the assembly process of existing hydraulic joints and hydraulic pipe joints through the following technical solution.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A hydraulic conduit, comprising:

[0008] The main body of the pipe has a threaded joint with a first mating surface at its end. The inner wall of the threaded joint is provided with a limiting ring, and the inner wall of the limiting ring forms a positioning groove.

[0009] A hydraulic connector, the end of which is provided with a threaded connector with a second mating surface, and the inner wall of the threaded connector is provided with a positioning boss;

[0010] A connecting nut, used to tighten the threaded joint connecting the pipe body and the hydraulic fitting;

[0011] A sealing ring is disposed between the first mating surface and the second mating surface;

[0012] The positioning boss and the positioning groove are adapted to each other and are inserted into each other during assembly to guide and constrain the first mating surface and the second mating surface to maintain parallel alignment, ensuring the coaxiality of the pipe body and the hydraulic joint when connected.

[0013] Preferably, the cross-sectional shape of the positioning boss is triangular, and the shape of the positioning groove is adapted to the cross-sectional shape of the positioning boss.

[0014] Preferably, a sealing protrusion is provided on the side of the positioning boss that contacts the inner wall of the positioning groove, and the sealing protrusion cooperates with the sealing ring to form a double seal.

[0015] Preferably, one end of the sealing ring is embedded in the groove corresponding to the second mating surface, and the other end is in contact with the surface of the first mating surface.

[0016] Preferably, one end of the sealing protrusion surrounds the side surface contacted by the positioning protrusion, and the other end is in contact with the inner wall of the positioning groove.

[0017] Preferably, the upper end face of the positioning boss is connected to a flow guide joint, and a guide channel is formed inside the flow guide joint, which communicates with the inner cavity of the pipe body.

[0018] Preferably, the guide channel is a trumpet-shaped expansion structure, with its narrow end aligned with the inner cavity of the pipe body.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The hydraulic pipeline provided in this application precisely guides and constrains the parallel alignment of two mating surfaces through the insertion and engagement of the positioning boss and the positioning groove in the limiting ring, ensuring coaxiality and solving the problem of poor accuracy in manual alignment. It also improves assembly efficiency, avoids stress concentration, reduces the risk of nut breakage, and, combined with the double sealing of the sealing ring and sealing protrusion, effectively prevents hydraulic medium leakage, ensuring stable and reliable system operation.

[0021] The matching shape of the positioning boss and the groove, along with the double seal of the sealing boss and the sealing ring, enhances sealing performance; the flared channel of the flow guide joint ensures uniform medium flow. These designs make hydraulic pipeline connections more secure, sealing better, and medium transmission more efficient, improving overall performance and reliability. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 is a schematic diagram of the disassembled structure of this utility model;

[0025] Figure 3 is a schematic diagram of the main structure of the pipeline of this utility model;

[0026] Figure 4 is a partial structural schematic diagram of the front cross-section of this utility model;

[0027] Figure 5 is a schematic cross-sectional view of the disassembled pipe body and hydraulic joint of this utility model.

[0028] Figure 6 is a schematic diagram of the pipe body and hydraulic joint of this utility model in the tightened state.

[0029] Drawing number explanation: 1. Pipe body; 11. First mating surface; 2. Hydraulic joint; 21. Second mating surface; 3. Connecting nut; 4. Sealing ring; 5. Positioning boss; 51. Sealing protrusion; 6. Limiting ring; 61. Positioning groove; 7. Flow guide joint; 71. Guide channel. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0032] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0033] It is understood that the term "a" should be understood as "at least one" or "one or more," meaning that in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity. Embodiments

[0034] Please refer to Figures 1-6. A hydraulic pipeline includes: a pipeline body 1, with a threaded connector at its end having a first mating surface 11, a limiting ring 6 on the inner wall of the threaded connector, and a positioning groove 61 formed on the inner wall of the limiting ring 6; a hydraulic connector 2, with a threaded connector at its end having a second mating surface 21, and a positioning boss 5 on the inner wall of the threaded connector; a connecting nut 3 for tightening the threaded connector connecting the pipeline body 1 and the hydraulic connector 2; and a sealing ring 4 disposed between the first mating surface 11 and the second mating surface 21. The positioning boss 5 and the positioning groove 61 are adapted in shape and are interlocked during assembly to guide and constrain the first mating surface 11 and the second mating surface 21 to maintain parallel alignment, ensuring the coaxiality of the pipeline body 1 and the hydraulic connector 2 when connected.

[0035] The hydraulic pipeline of this application is mainly composed of a pipeline body 1, a first mating surface 11, a hydraulic connector 2, a second mating surface 21, a connecting nut 3, a sealing ring 4, a positioning boss 5, and a limiting ring 6. The following is a detailed description of its structure and working principle.

[0036] The main pipe 1, serving as the basic channel for hydraulic medium transmission, is made of high-strength alloy steel. Its ends are machined to form threaded joints with a first mating surface 11. A limiting ring 6, equipped with a positioning groove 61, is fixed to the inner wall of this threaded joint by welding or integral molding. The shape of the positioning groove 61 after installation matches the shape of the positioning boss 5. The depth of the positioning groove 61 is consistent with the height of the insertion part of the positioning boss 5, ensuring a tight fit. The first mating surface 11 is ground using a high-precision surface grinder, providing a good foundation for a good sealing effect.

[0037] The hydraulic connector 2 is made of a material compatible with the main pipe body 1. Its end is machined to form a threaded connector with a second mating surface 21. The inner wall of the threaded connector is connected to a positioning boss 5 by welding or integral molding. The positioning boss 5 has a right-angled triangular cross-section. On the side where the positioning boss 5 contacts the inner wall of the positioning groove 61, an annular groove is machined using a milling process, and a sealing protrusion 51 made of nitrile rubber is embedded in it to enhance the sealing performance. The second mating surface 21 is also machined with high precision to ensure its surface flatness.

[0038] The sealing ring 4 is made of fluororubber. One end is embedded into the groove corresponding to the second mating surface 21 through injection molding. The groove depth is designed to be half the thickness of the sealing ring 4 to prevent displacement during assembly and use. The other end fits tightly against the first mating surface 11 during assembly to form a sealing contact. The connecting nut 3 is made of high-strength alloy steel, and its internal threads are precisely matched with the threads of the pipe body 1 and the hydraulic connector 2 to ensure good sealing and reliability during tightening.

[0039] On the upper end face of the positioning boss 5 on the inner wall of the hydraulic connector 2 threaded connector, a flow guide 7 is connected by a thread. The flow guide 7 is formed by casting process, and its internal guide channel 71 is cast into a funnel-shaped expansion structure. The inner diameter of the narrow end is the same as the inner diameter of the pipe body 1 to ensure that the hydraulic medium can flow in smoothly; the diameter of the wide end is designed according to the actual use requirements to achieve uniform flow of hydraulic medium and reduce pressure fluctuations.

[0040] Working principle

[0041] When assembling the pipe body 1 and the hydraulic connector 2, firstly, correctly install the sealing ring 4 into the groove of the second mating surface 21. Next, align the positioning boss 5 on the inner wall of the threaded connector of the hydraulic connector 2 with the positioning groove 61 on the inner wall of the threaded connector of the pipe body 1. Due to the shape matching of the positioning boss 5 and the positioning groove 61, the operator can easily complete the initial alignment of the first mating surface 11 and the second mating surface 21. Subsequently, use a special assembly tool to screw the connecting nut 3 onto the two threaded connectors. During the tightening of the connecting nut 3, the positioning boss 5 and the positioning groove 61 interlock and form a constraint, ensuring that the first mating surface 11 and the second mating surface 21 remain parallel and aligned at all times. This effectively prevents local stress concentration caused by misalignment of the mating surfaces, ensuring that the connecting nut 3 operates within its normal load range and reducing the risk of nut breakage.

[0042] When the connecting nut 3 is tightened to the correct position, the sealing ring 4 is deformed by the pressure of the first mating surface 11 and the second mating surface 21, forming the first sealing barrier between the two mating surfaces. At the same time, the sealing protrusion 51 on the side of the positioning boss 5 is in close contact with the inner wall of the positioning groove 61, further preventing the hydraulic medium from leaking from the connection between the positioning boss 5 and the positioning groove 61. This, together with the sealing ring 4, forms a double sealing structure, greatly improving the sealing performance of the hydraulic pipeline connection and effectively preventing hydraulic medium leakage.

[0043] During the operation of the hydraulic system, the hydraulic medium flows out from the inner cavity of the main pipe 1 and enters the guide channel 71 of the guide connector 7 on the upper end face of the positioning boss 5 on the inner wall of the threaded connector of the hydraulic connector 2. Because the guide channel 71 has a funnel-shaped expansion structure, the flow velocity of the hydraulic medium gradually decreases during the flow process, and the pressure distribution becomes more uniform. This avoids pressure fluctuations and energy losses caused by sudden changes in flow velocity, thereby achieving efficient and stable transmission of the hydraulic medium and ensuring the stable operation of the hydraulic system.

[0044] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A hydraulic pipeline, characterized in that, include: The pipe body (1) has a threaded connector with a first mating surface (11) at its end. The inner wall of the threaded connector is provided with a limiting ring (6), and the inner wall of the limiting ring (6) forms a positioning groove (61). The hydraulic connector (2) has a threaded connector with a second mating surface (21) at its end. The inner wall of the threaded connector is provided with a positioning boss (5). The connecting nut (3) is used to tighten the threaded connector connecting the pipe body (1) and the hydraulic connector (2). The sealing ring (4) is set between the first mating surface (11) and the second mating surface (21). The positioning boss (5) and the positioning groove (61) are adapted to each other and are inserted into each other during assembly to guide and constrain the first mating surface (11) and the second mating surface (21) to maintain parallel alignment and ensure the coaxiality of the pipe body (1) and the hydraulic connector (2) when connected.

2. A hydraulic pipeline according to claim 1, characterized in that: The positioning boss (5) has a triangular cross-sectional shape, and the shape of the positioning groove (61) is adapted to the cross-sectional shape of the positioning boss (5).

3. A hydraulic pipeline according to claim 1, characterized in that: A sealing protrusion (51) is provided on the side of the positioning boss (5) that contacts the inner wall of the positioning groove (61). The sealing protrusion (51) and the sealing ring (4) cooperate to form a double seal.

4. A hydraulic pipeline according to claim 1, characterized in that: One end of the sealing ring (4) is embedded in the groove corresponding to the second mating surface (21), and the other end is in contact with the surface of the first mating surface (11).

5. A hydraulic pipeline according to claim 3, characterized in that: One end of the sealing protrusion (51) surrounds the side surface in contact with the embedded positioning protrusion (5), and the other end forms a contact state with the inner wall of the positioning groove (61).

6. A hydraulic pipeline according to claim 1, characterized in that: The upper end face of the positioning boss (5) is connected to a flow guide (7), and a guide channel (71) is formed inside the flow guide (7), which is connected to the inner cavity of the pipe body (1).

7. A hydraulic pipeline according to claim 6, characterized in that: The guide channel (71) is a trumpet-shaped expansion structure, with its narrow end aligned with the inner cavity of the pipe body (1).

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